package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


/**
 * DAO 层的实现类
 *
 */
public class CourseDaoImpl implements CourseDao {


    @Override
    public List<Course> findCourseList() {
        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        //编写SQL  判断是否删除， 取出未删除的数据
        String sql = "SELECT \n" +
                "\tid, course_name,price, sort_num, STATUS\n" +
                "\n" +
                "FROM course \n" +
                "WHERE is_del = ? ";

        try {
            List<Course> courseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return null;
    }

    //根据条件查询
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {
        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        //2. 当前查询条件为多条件不定项查询
        //2.1 创建StringBuffer
        //String sql =

        StringBuffer sb = new StringBuffer(" SELECT id, course_name, price, sort_num, STATUS FROM course WHERE  1 = 1 and is_del = ?  ");
        //创建List 集合 保存参数
        List<Object> list = new ArrayList<>();
        list.add(0);

        if ( courseName != null && courseName != ""){

            sb.append(" AND course_name LIKE ?  ");
            courseName= "%" + courseName + "%";

            //将条件放到list 集合
            list.add(courseName);
        }

        if (status != null && status != "" ){

            sb.append(" AnD status = ?  ");
            //将status 转换我int
            int i = Integer.parseInt(status);
            list.add(i);

        }

        //执行查询
        try {
            List<Course> courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());

            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
        }


        return null;
    }


    //保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {
        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource() );
        //编写SQL
        String sql = "INSERT INTO course (\n" +
                "course_name,\n" +
                "brief,\n" +
                "teacher_name,\n" +
                "teacher_info,\n" +
                "preview_first_field,\n" +
                "preview_second_field,\n" +
                "discounts,\n" +
                "price,\n" +
                "price_tag,\n" +
                "share_image_title,\n" +
                "share_title,\n" +
                "share_description, \n" +
                "course_description,\n" +
                "course_img_url, \n" +
                "STATUS,\n" +
                "create_time,\n" +
                "update_time\n" +
                ")VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);";

        // 3.填写参数
        Object[] param = {course.getCourse_name(), course.getBrief(), course.getTeacher_name(), course.getTeacher_info(), course.getPreview_first_field(), course.getPreview_second_field(), course.getDiscounts(), course.getPrice(), course.getPrice_tag(), course.getShare_image_title(),
                          course.getShare_title() , course.getShare_description(), course.getCourse_description(), course.getCourse_img_url(), course.getStatus(), course.getCreate_time(), course.getUpdate_time()  };

        //执行插入操作
        try {
            int row = qr.update(sql, param);
            return row;

        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }

    //根据id 查询课程信息
    @Override
    public Course findCourseById(int id) {

        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        String sql = "SELECT \n" +
                "id,\n" +
                "course_name,\n" +
                "brief,\n" +
                "teacher_name,\n" +
                "teacher_info,\n" +
                "preview_first_field,\n" +
                "preview_second_field,\n" +
                "discounts,\n" +
                "price,\n" +
                "price_tag,\n" +
                "course_img_url,\n" +
                "share_image_title,\n" +
                "share_title,\n" +
                "share_description,\n" +
                "course_description,\n" +
                "STATUS\n" +
                "FROM course WHERE id = ?;";


        try {
            Course course = qr.query(sql,  new BeanHandler<Course>(Course.class), id);
            return course;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }

    }



    //修改课程营销信息
    @Override
    public int updateCourseSalesInfo(Course course) {

        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        String sql = "UPDATE course SET \n" +
                "course_name = ?,\n" +
                "brief = ?,\n" +
                "teacher_name = ?,\n" +
                "teacher_info = ?,\n" +
                "preview_first_field = ?,\n" +
                "preview_second_field = ?,\n" +
                "discounts = ?,\n" +
                "price = ?,\n" +
                "price_tag = ?,\n" +
                "share_image_title = ?,\n" +
                "share_title = ?,\n" +
                "share_description = ?,\n" +
                "course_description = ?,\n" +
                "course_img_url = ?,\n" +
                "update_time = ?\n" +
                "WHERE id = ?";


        Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),
                course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),
                course.getCourse_img_url(),course.getUpdate_time(),course.getId()};

        try {
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return 0;
    }


    //修改课程状态
    @Override
    public int updateCourseStatus(Course course) {
        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        String sql = "UPDATE course SET STATUS = ? ,update_time = ? WHERE id = ?";

        Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};

        try {
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
        }


        return 0;
    }
}
